/* * Copyright (C) 2021 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.hookedonplay.decoviewlib.interpolator;

/**
 * Anticipate overshoot interpolator
 */
public class AnticipateOvershootInterpolator extends BaseInterpolator {
    /**
     * M tension
     */
    private final float mTension;

    /**
     * Anticipate overshoot interpolator
     */
    public AnticipateOvershootInterpolator() {
        mTension = 2.0f * 1.5f;
    }

    /**
     * Anticipate overshoot interpolator
     *
     * @param tension tension
     */
    public AnticipateOvershootInterpolator(float tension) {
        mTension = tension * 1.5f;
    }

    /**
     * Anticipate overshoot interpolator
     *
     * @param tension      tension
     * @param extraTension extra tension
     */
    public AnticipateOvershootInterpolator(float tension, float extraTension) {
        mTension = tension * extraTension;
    }


    /**
     * A float
     *
     * @param valueT valueT
     * @param valueS valueS
     * @return the float
     */
    private static float methodA(float valueT, float valueS) {
        return valueT * valueT * ((valueS + 1) * valueT - valueS);
    }

    /**
     * O float
     *
     * @param ValueT ValueT
     * @param valueS valueS
     * @return the float
     */
    private static float methodO(float ValueT, float valueS) {
        return ValueT * ValueT * ((valueS + 1) * ValueT + valueS);
    }

    /**
     * Get interpolation float
     *
     * @param input input
     * @return the float
     */
    public float getInterpolation(float input) {
        if (input < 0.5f) {
            return 0.5f * methodA(input * 2.0f, mTension);
        } else {
            return 0.5f * (methodO(input * 2.0f - 2.0f, mTension) + 2.0f);
        }
    }
}